Tuesday, May23, 2017 L-36.com

Marine Weather and Tides
Ponderay, ID

Version 3.4
What's New / NOTES
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 4:57AMSunset 8:30PM Tuesday May 23, 2017 1:45 AM PDT (08:45 UTC) Moonrise 4:04AMMoonset 5:50PM Illumination 6% Phase: Waning Crescent; Moon at 27 days in cycle
NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.
Marine Forecasts
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7 Day Forecast for Marine Location Near Ponderay, ID
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location: 48.36, -116.55     debug

Area Discussion for - Spokane, WA
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Fxus66 kotx 222325
area forecast discussion
national weather service spokane wa
425 pm pdt Mon may 22 2017

Tuesday will be warm with continued rises expected on local
rivers and streams in the cascades and across the northern
mountains of washington and idaho. A strong cold front will plow
through the region Tuesday evening bringing gusty winds. Breezy
winds will usher the cooler air into the region Wednesday
knocking temperatures down almost twenty degrees from Tuesday.

Cooler and unsettled weather will likely persist through the end
of the week with a warming trend for the weekend.

Gusty winds Tuesday evening/night with passage of strong cold front...

tonight through Tuesday afternoon: it will feel a lot like summer
during the next 24 hours courtesy of high pressure anchored over
the northwestern us. Overnight lows will only be cooling into the
50s allowing afternoon highs on Tuesday to warm into the 80s to
lower 90s. Outside some thin cirrus, clouds will generally be
clear and winds will be light.

Tuesday evening through Wednesday: models are in good agreement that a
strong cold front will plow through the region late Tuesday. This
will be a dry cold front passage so there are little concerns for
precipitation in this event. The main focus will be on winds. The
challenging aspect of this front is the timing. We are confident
that strong cold air advection will accompany the front with
afternoon highs expected to be on the order of 20-25 degrees
cooler Wednesday however the timing of the front close to dark or
later suggests lowlands may have the opportunity to decouple.

Regardless, the front looks too strong to in my eyes to remain
decoupled during and shortly after the actual frontal passage
which looks to be supported by hi-res model data.

Winds look to increase from the south late Tuesday afternoon, decouple
prior to sunset, then ramp up and swing around to the west with
the cold front passage. This could be quite a punch of winds with
this time period carrying the highest risk for strong gusts.

Following the front, the boundary layer may decouple (winds
becoming lighter) for a few hours Wednesday morning then increase
again Wednesday morning as morning inversions mix out. The front
is expected to move into central wa and the cascades in the
evening (7-10pm) then into ERN wa and N id 10pm-1am. Bufkit data
from the wenatchee ap also suggest a weak stable layer 5-8 ft agl
which could also pose a threat for breaking waves in and around
the waterville plateau. Potential wind gusts on the cascade
ridgetops and waterville plateau could be upwards of 40-55 mph.

These will carry a lower threat for surfacing in the deeper
valleys along the wenatchee and columbia river valleys for
reasoning mentioned above. Wind gusts across the, okanogan valley,
columbia basin and into the lower idaho panhandle should be
weaker but still pose a threat for speeds on the order of 35-45
mph. Winds will be breezy through the day on Wednesday but winds
aloft will be weakening and gust potential will decrease closer to
25 mph by afternoon. Temperatures by Wednesday afternoon will
only be warming into the 60s to lower 70s in the deep basin.

The resident mild air mass will continue to cook high elevation snow
leading to increasing runoff. River basins in the cascades and
across northern wa/id are experiencing significant rises. The
okanogan and stehekin rivers have a good shot of rising into minor
flood Tuesday. We are also monitoring the kettle river for
potential minor flooding. The entiat, methow, moyie, and kootenai
are or will be reaching bankfull and continue to be updated in the
hydrologic statement. /sb
Wednesday night through Saturday morning... The upper level low will
shift east of the continental divide Wednesday and take up
position over the canadian providences. Meanwhile high pressure
will amplify in the eastern pacific. This will put the pac NW in a
northerly flow. The atmosphere will slowly destabilize on
Thursday and more so on Friday. Numerous weak waves will wrap
around the parent low and move from north to south through central
washington on Thursday and then along the id/mt border on Friday.

These waves will have be able to tap into a little better
moisture for a chance of mainly showers on Thursday and showers
and thunderstorms on Friday across extreme eastern washington and
the idaho panhandle. Precipitation amounts with any of these
showers and thunderstorms will be under a tenth of an inch. Small
hail and gusty outflow winds will be possible with any
thunderstorms. Cooler then normal temperatures on Thursday will
begin to rebound with temperatures rising into the high 60s and
lower 70s. Temperatures will bottom out on Wednesday then show a
slow rise each day. Winds will remain elevated and gusty at times
with the showers and thunderstorms. Gusty winds will linger across
the area Wednesday evening, but should become diurnal by Thursday
Saturday through Monday... The ridge of high pressure will be along
the coast on Saturday and over central washington on Sunday and
Monday. Showers will be kept in the forecast for the panhandle for
Saturday, but confidence is low that we will see much more then
cloud build ups. Model guidance is showing a couple of short wave
disturbances trying to under cut the ridge on Sunday and Monday
and this would be enough forcing for isolated showers over the
mountains at times. But again confidence in anything more than
cumulus build ups is low. Temperatures will rebound nicely through
the weekend with highs rising into the high 70s to near 90 for
Sunday and Monday. Winds will be light and variable and diurnally
driven. Tobin

00z tafs: high pressure will remain over the region through
Tuesday afternoon. Some high cirrus will move over the region at
times for some scattered cirrus. A cold front will move into the
region Tuesday night with winds expected to increase out of the
southwest after 22z Tuesday with gusts 18-25kts. Tobin

Preliminary point temps/pops
Spokane 57 85 48 64 47 65 / 0 0 0 10 10 30
coeur d'alene 53 83 47 62 44 64 / 0 0 10 10 10 30
pullman 52 83 49 63 45 62 / 0 0 0 0 10 20
lewiston 56 90 53 68 48 68 / 0 0 0 0 10 20
colville 53 86 48 67 46 67 / 0 0 0 10 10 30
sandpoint 48 81 44 61 41 63 / 0 0 0 10 20 50
kellogg 48 81 43 60 41 61 / 0 0 0 10 10 50
moses lake 56 92 51 72 47 73 / 0 0 0 0 0 10
wenatchee 60 90 50 69 48 72 / 0 0 0 0 0 10
omak 57 88 49 70 48 72 / 0 0 0 10 10 10

Otx watches/warnings/advisories
Id... None.

Wa... None.

Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Sandpoint, Sandpoint Airport, ID4 mi51 minN 010.00 miFair50°F44°F82%1019.3 hPa

Wind History from SZT (wind in knots)
Last 24hrCalmCalmCalmCalmCalmCalmCalmNE6E6SE3E3SE4SE4E4E5E3E3CalmCalmCalmCalmCalmCalmCalm
1 day agoW3CalmCalmCalmCalmCalmNE3SE5SE4CalmE5E5E7E8E8CalmCalmCalmW3SW5CalmCalmCalmCalm
2 days agoCalmCalmNE7CalmCalmNE10N13

Tide / Current Tables for
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Tide / Current Tables for
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Weather Map and Satellite Images
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Weather Map
IR Satellite Image from GEOS

GOES Local Image of PacificNorthwest    EDIT

Wind Forecast for Spokane, WA (4,6,7,8)
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Ground Weather Radar Station Spokane, WA
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The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerious of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.